AaBb

# Regular constructor where vec_one and vec_two are instances of Vec2D
AaBb.new(center: vec_one, extent: vec_two)
# Alternative constructor where vec_one and vec_two are instances of Vec2D
AaBb.new(min: vec_one, max: vec_two)

center # returns the AaBb center Vec2D
extent # returns the AaBb extent as Vec2D
position(vec)           # set the center as vec
position(vec) { block } # set the center as vec, if block evaluates to true
contains?(vec)          # returns true/false if box contains point at vec